劳动法规定,劳动者解除劳动合同应提前()天以()形式通知用人单位。
A.15/书面
B.15/口头
C.30/书面
D.30/口头
参考答案:C
Next, John Snow ______ the source of the water for these two streets and found it came
from the polluted river.
A. looked into
B. looked up
C. looked after
D. looked around